I have a 96 dodge pickup with a 360 and the oil pressure dosent stay in one spot it will bounce around from 0 to 50 on the gauge. This is will driving same speed or stoping and starting. Some times it will stay at o and not move for 10 seconds. It is full on the dip stick for oil. Could it be the oil pump or something else? The oil pressure shouldent be at 0 will the engine is running.